1/*
2 * Copyright (c) 1992, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2000
5 * Poul-Henning Kamp. All rights reserved.
6 *
7 * This code is derived from software donated to Berkeley by
8 * Jan-Simon Pendry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)kernfs_vfsops.c 8.10 (Berkeley) 5/14/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vfsops.c 1.36
33 *
| 1/*
2 * Copyright (c) 1992, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2000
5 * Poul-Henning Kamp. All rights reserved.
6 *
7 * This code is derived from software donated to Berkeley by
8 * Jan-Simon Pendry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)kernfs_vfsops.c 8.10 (Berkeley) 5/14/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vfsops.c 1.36
33 *
|
34 * $FreeBSD: head/sys/fs/devfs/devfs_vfsops.c 65051 2000-08-24 15:36:55Z phk $
| 34 * $FreeBSD: head/sys/fs/devfs/devfs_vfsops.c 65132 2000-08-27 14:46:36Z phk $
|
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/proc.h>
41#include <sys/vnode.h>
42#include <sys/mount.h>
43#include <sys/malloc.h>
44#include <sys/eventhandler.h>
45
46#define DEVFS_INTERN
47#include <fs/devfs/devfs.h>
48
49MALLOC_DEFINE(M_DEVFS, "DEVFS", "DEVFS data");
50
51static int devfs_mount __P((struct mount *mp, char *path, caddr_t data,
52 struct nameidata *ndp, struct proc *p));
53static int devfs_unmount __P((struct mount *mp, int mntflags,
54 struct proc *p));
55static int devfs_root __P((struct mount *mp, struct vnode **vpp));
56static int devfs_statfs __P((struct mount *mp, struct statfs *sbp,
57 struct proc *p));
58
59/*
60 * Mount the filesystem
61 */
62static int
63devfs_mount(mp, path, data, ndp, p)
64 struct mount *mp;
65 char *path;
66 caddr_t data;
67 struct nameidata *ndp;
68 struct proc *p;
69{
| 35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/proc.h>
41#include <sys/vnode.h>
42#include <sys/mount.h>
43#include <sys/malloc.h>
44#include <sys/eventhandler.h>
45
46#define DEVFS_INTERN
47#include <fs/devfs/devfs.h>
48
49MALLOC_DEFINE(M_DEVFS, "DEVFS", "DEVFS data");
50
51static int devfs_mount __P((struct mount *mp, char *path, caddr_t data,
52 struct nameidata *ndp, struct proc *p));
53static int devfs_unmount __P((struct mount *mp, int mntflags,
54 struct proc *p));
55static int devfs_root __P((struct mount *mp, struct vnode **vpp));
56static int devfs_statfs __P((struct mount *mp, struct statfs *sbp,
57 struct proc *p));
58
59/*
60 * Mount the filesystem
61 */
62static int
63devfs_mount(mp, path, data, ndp, p)
64 struct mount *mp;
65 char *path;
66 caddr_t data;
67 struct nameidata *ndp;
68 struct proc *p;
69{
|
70 int error = 0;
| 70 int error;
|
71 u_int size;
72 struct devfs_mount *fmp;
73 struct vnode *rvp;
74
| 71 u_int size;
72 struct devfs_mount *fmp;
73 struct vnode *rvp;
74
|
| 75 error = 0;
|
75 /*
| 76 /*
|
76 * Update is a no-op
| 77 * XXX: flag changes.
|
77 */
78 if (mp->mnt_flag & MNT_UPDATE)
79 return (EOPNOTSUPP);
80
| 78 */
79 if (mp->mnt_flag & MNT_UPDATE)
80 return (EOPNOTSUPP);
81
|
81 MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount), M_DEVFS, M_WAITOK);
82
| 82 MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount),
83 M_DEVFS, M_WAITOK);
|
83 bzero(fmp, sizeof(*fmp));
84
| 84 bzero(fmp, sizeof(*fmp));
85
|
85 error = getnewvnode(VT_DEVFS, mp, devfs_vnodeop_p, &rvp);
86 if (error) {
87 FREE(fmp, M_DEVFS);
88 return (error);
89 }
90
91 vhold(rvp);
92 rvp->v_type = VDIR;
93 rvp->v_flag |= VROOT;
| |
94 mp->mnt_flag |= MNT_LOCAL;
95 mp->mnt_data = (qaddr_t) fmp;
96 vfs_getnewfsid(mp);
97
98 fmp->dm_inode = NDEVINO;
| 86 mp->mnt_flag |= MNT_LOCAL;
87 mp->mnt_data = (qaddr_t) fmp;
88 vfs_getnewfsid(mp);
89
90 fmp->dm_inode = NDEVINO;
|
99 fmp->dm_root = rvp;
| |
100
101 fmp->dm_rootdir = devfs_vmkdir("(root)", 6, NULL);
102 fmp->dm_rootdir->de_inode = 2;
| 91
92 fmp->dm_rootdir = devfs_vmkdir("(root)", 6, NULL);
93 fmp->dm_rootdir->de_inode = 2;
|
103 rvp->v_data = fmp->dm_rootdir;
104
| |
105 fmp->dm_basedir = fmp->dm_rootdir;
106
| 94 fmp->dm_basedir = fmp->dm_rootdir;
95
|
| 96 error = devfs_root(mp, &rvp);
97 if (error) {
98 FREE(fmp, M_DEVFS);
99 return (error);
100 }
101 VOP_UNLOCK(rvp, 0, p);
102
|
107 if (path != NULL) {
108 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
109 } else {
110 strcpy(mp->mnt_stat.f_mntonname, "/");
111 size = 1;
112 }
113 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
114 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
115 bcopy("devfs", mp->mnt_stat.f_mntfromname, sizeof("devfs"));
116 (void)devfs_statfs(mp, &mp->mnt_stat, p);
117 devfs_populate(fmp);
118
119 return (0);
120}
121
122static int
123devfs_unmount(mp, mntflags, p)
124 struct mount *mp;
125 int mntflags;
126 struct proc *p;
127{
128 int error;
129 int flags = 0;
| 103 if (path != NULL) {
104 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
105 } else {
106 strcpy(mp->mnt_stat.f_mntonname, "/");
107 size = 1;
108 }
109 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
110 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
111 bcopy("devfs", mp->mnt_stat.f_mntfromname, sizeof("devfs"));
112 (void)devfs_statfs(mp, &mp->mnt_stat, p);
113 devfs_populate(fmp);
114
115 return (0);
116}
117
118static int
119devfs_unmount(mp, mntflags, p)
120 struct mount *mp;
121 int mntflags;
122 struct proc *p;
123{
124 int error;
125 int flags = 0;
|
130 struct vnode *rootvp = VFSTODEVFS(mp)->dm_root;
| 126 struct vnode *rootvp;
|
131 struct devfs_mount *fmp;
132
| 127 struct devfs_mount *fmp;
128
|
133 fmp = (struct devfs_mount*) mp->mnt_data;
| 129 error = devfs_root(mp, &rootvp);
130 if (error)
131 return (error);
132 fmp = VFSTODEVFS(mp);
|
134 if (mntflags & MNT_FORCE)
135 flags |= FORCECLOSE;
| 133 if (mntflags & MNT_FORCE)
134 flags |= FORCECLOSE;
|
136
137 /*
138 * Clear out buffer cache. I don't think we
139 * ever get anything cached at this level at the
140 * moment, but who knows...
141 */
| |
142 if (rootvp->v_usecount > 2)
143 return (EBUSY);
144 devfs_purge(fmp->dm_rootdir);
145 error = vflush(mp, rootvp, flags);
146 if (error)
147 return (error);
| 135 if (rootvp->v_usecount > 2)
136 return (EBUSY);
137 devfs_purge(fmp->dm_rootdir);
138 error = vflush(mp, rootvp, flags);
139 if (error)
140 return (error);
|
148
149 /*
150 * Release reference on underlying root vnode
151 */
| 141 vput(rootvp);
|
152 vrele(rootvp);
| 142 vrele(rootvp);
|
153 /*
154 * And blow it away for future re-use
155 */
| |
156 vgone(rootvp);
| 143 vgone(rootvp);
|
157 /*
158 * Finally, throw away the devfs_mount structure
159 */
160 free(mp->mnt_data, M_DEVFS);
| |
161 mp->mnt_data = 0;
| 144 mp->mnt_data = 0;
|
| 145 free(fmp, M_DEVFS);
|
162 return 0;
163}
164
| 146 return 0;
147}
148
|
| 149/* Return locked reference to root. */
150
|
165static int
166devfs_root(mp, vpp)
167 struct mount *mp;
168 struct vnode **vpp;
169{
| 151static int
152devfs_root(mp, vpp)
153 struct mount *mp;
154 struct vnode **vpp;
155{
|
170 struct proc *p = curproc; /* XXX */
| 156 int error;
157 struct proc *p;
|
171 struct vnode *vp;
| 158 struct vnode *vp;
|
| 159 struct devfs_mount *dmp;
|
172
| 160
|
173 /*
174 * Return locked reference to root.
175 */
176 vp = VFSTODEVFS(mp)->dm_root;
177 VREF(vp);
178 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
| 161 p = curproc; /* XXX */
162 dmp = VFSTODEVFS(mp);
163 error = devfs_allocv(dmp->dm_rootdir, mp, &vp, p);
164 if (error)
165 return (error);
166 vp->v_flag |= VROOT;
|
179 *vpp = vp;
180 return (0);
181}
182
183static int
184devfs_statfs(mp, sbp, p)
185 struct mount *mp;
186 struct statfs *sbp;
187 struct proc *p;
188{
189
190 sbp->f_flags = 0;
191 sbp->f_bsize = DEV_BSIZE;
192 sbp->f_iosize = DEV_BSIZE;
193 sbp->f_blocks = 2; /* 1K to keep df happy */
194 sbp->f_bfree = 0;
195 sbp->f_bavail = 0;
196 sbp->f_files = 0;
197 sbp->f_ffree = 0;
198 if (sbp != &mp->mnt_stat) {
199 sbp->f_type = mp->mnt_vfc->vfc_typenum;
200 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
201 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
202 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
203 }
204 return (0);
205}
206
207static struct vfsops devfs_vfsops = {
208 devfs_mount,
209 vfs_stdstart,
210 devfs_unmount,
211 devfs_root,
212 vfs_stdquotactl,
213 devfs_statfs,
214 vfs_stdsync,
215 vfs_stdvget,
216 vfs_stdfhtovp,
217 vfs_stdcheckexp,
218 vfs_stdvptofh,
219 vfs_stdinit,
220 vfs_stduninit,
221 vfs_stdextattrctl,
222};
223
224VFS_SET(devfs_vfsops, devfs, VFCF_SYNTHETIC);
| 167 *vpp = vp;
168 return (0);
169}
170
171static int
172devfs_statfs(mp, sbp, p)
173 struct mount *mp;
174 struct statfs *sbp;
175 struct proc *p;
176{
177
178 sbp->f_flags = 0;
179 sbp->f_bsize = DEV_BSIZE;
180 sbp->f_iosize = DEV_BSIZE;
181 sbp->f_blocks = 2; /* 1K to keep df happy */
182 sbp->f_bfree = 0;
183 sbp->f_bavail = 0;
184 sbp->f_files = 0;
185 sbp->f_ffree = 0;
186 if (sbp != &mp->mnt_stat) {
187 sbp->f_type = mp->mnt_vfc->vfc_typenum;
188 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
189 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
190 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
191 }
192 return (0);
193}
194
195static struct vfsops devfs_vfsops = {
196 devfs_mount,
197 vfs_stdstart,
198 devfs_unmount,
199 devfs_root,
200 vfs_stdquotactl,
201 devfs_statfs,
202 vfs_stdsync,
203 vfs_stdvget,
204 vfs_stdfhtovp,
205 vfs_stdcheckexp,
206 vfs_stdvptofh,
207 vfs_stdinit,
208 vfs_stduninit,
209 vfs_stdextattrctl,
210};
211
212VFS_SET(devfs_vfsops, devfs, VFCF_SYNTHETIC);
|